Descriptive statistics of the 3287 men according to intelligence test score: the Copenhagen Perinatal Cohort 1959–1961, with follow-up until 2015, Denmark
| Intelligence test score | P value* | |||
| <90 (n=800) | 90–110 (n=1586) | >110 (n=901) | ||
| Psychiatric disorders, n (%)† | ||||
| Yes | 227 (28.4) | 269 (17.0) | 96 (10.7) | <0.001 |
| No | 573 (71.6) | 1317 (83.0) | 805 (89.4) | |
| Parental alcohol use disorders, n (%) | ||||
| Yes | 108 (15.7) | 151 (10.6) | 46 (5.6) | <0.001 |
| No | 582 (84.4) | 1270 (89.4) | 771 (94.4) | |
| Parental psychiatric disorders, n (%)† | ||||
| Yes | 217 (31.5) | 382 (26.9) | 166 (20.3) | <0.001 |
| No | 473 (68.6) | 1039 (73.1) | 651 (79.7) | |
| Maternal smoking during pregnancy, n (%) | ||||
| Yes | 462 (59.5) | 795 (51.5) | 371 (41.9) | <0.001 |
| No | 314 (40.5) | 749 (48.5) | 514 (58.1) | |
| Birth weight (grams), mean (SD) | 3179 (660.7) | 3275 (622.7) | 3373 (605.1) | <0.001 |
| Maternal age at birth (years), mean (SD) | 25.3 (6.70) | 25.4 (6.33) | 27.5 (6.37) | <0.001 |
| Parity, first pregnancy, n (%) | ||||
| Yes | 366 (45.8) | 835 (52.7) | 468 (52.1) | 0.004 |
| No | 433 (54.2) | 749 (47.3) | 430 (47.9) | |
| Childhood socioeconomic position, mean (SD)‡ | 3.1 (1.44) | 3.9 (1.69) | 5.1 (1.86) | <0.001 |
*P value for χ2 tests or ANOVA.
†The variable included registration of psychiatric disorders other than alcohol use disorders.
‡Linear component (1–8 score with higher points indicating higher childhood socioeconomic position).
ANOVA, analysis of variance.